John Oliver has done his best to avoid talking about Donald Trump on Last Week Tonight, but he finally had to take on the real estate mogul. He spent over 20 minutes on Trump during his Feb. 28 episode.

Since Trump has won three early primary states (New Hampshire, South Carolina and Nevada) and is leading in many super Tuesday states, Oliver and his writers decided that it was finally time.

“At this point, Donald Trump is America’s back mole,” Oliver said. “It may have seemed harmless a year ago, but now that it’s gotten frighteningly bigger, it is no longer wise to ignore it.”

Oliver went through several statements Trump has said over the years and noted how they don’t often turn out to be true. Oliver then reminded everyone that a biographer discovered that one of Trump’s ancestors changed their last name from “Drumpf.” So, the Last Week Tonight campaign has started a campaign to make Donald Drumpf president.